塔西南坳陷二叠系烃源岩控制因素探讨  

Controlling Factors of Permian Hydrocarbon Source Rocks in the Southwest Depression of Tarim Basin

作　　者：孟苗苗[1] 康志宏[1] 邱海峻[2] 李世臻[2] 张斌[3] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国地质调查局油气资源调查中心,北京100029 [3]河南省航空物探遥感中心,郑州450053

出　　处：《矿物岩石地球化学通报》2016年第2期344-352,共9页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国土资源部全国油气资源战略选区调查与评价专项(第二批)(2009GYXQ02)

摘　　要：为探讨塔西南坳陷二叠系烃源岩发育的控制因素,对烃源岩开展了微量元素和碳氧同位素分析研究。结果表明,该烃源岩受古盐度和古气候、原始生产力、氧化还原环境、海平面变化等因素综合作用的控制。其中,古盐度和古气候控制了烃源岩形成的沉积环境,原始生产力决定了有机质的富集和有机碳含量的高低,氧化还原环境决定了沉积有机质的保存情况,海平面变化对原始生产力和氧化还原条件等有重要的影响。这些因素综合作用控制了烃源岩的发育,同时又相互影响。In order to discuss controlling factors for the development of Permian hydrocarbon source rocks in the southwest depression of Tarim Basin, studies on trace elements and carbon-oxygen isotopes of the Permian hydrocarbon source rocks have been carried out in this paper. Results show that the development and distribution of those Permian hydrocarbon source rocks were controlled under various factors including palaeosalinity, palaeoclimate, primary productivity, redox en- vironment, sea level change. Specifically, the palaeosalinity and palaeoclimate controlled the sedimentary environment of the formation of hydrocarbon source rocks. The original productivity controlled the enrichment of organic matters and the level of TOC. The redox environment controlled the preservation of sedimentary organic matters. The sea level change has significant effect on the original productivity and redox conditions. These factors collectively controlled the development of hydrocarbon source rock with mutual influence.

关 键 词：塔西南坳陷 二叠系 烃源岩 微量元素 碳氧同位素 

分 类 号：P618.13[天文地球—矿床学]